SU1176199A1 - Arrangement for determining position of wheel pair on rail track - Google Patents

Abstract

1. A DEVICE FOR DETERMINING THE POSITION OF A WHEEL PAIR IN A TRAIL COIL, consisting of a rigid frame designed to be attached to the axle box and a carrier pair of sensors. Connected with instrumentation, characterized in that, in order to expand the functionality, at least three capacitive contactless transducers are used as sensors, two of which are sequentially installed over one rail and the rest over the other, and the instrumentation is equipped with three blocks registering lateral displacement of the wheelset, the angular displacement of the wheelset in the horizontal plane and the change in the distance between the heads of the rails 3 2. The device according to claim 1, about tonnes (L ch It is due to the fact that, in order to improve the accuracy of the adjustment of the position of the transducers, the latter are mounted in the frame grooves using bolted joints.

Description

1 The invention relates to rail transport, in particular, to devices for determining the position of a wheel pair in a rail track, and can be used to carry out research on the interaction of a sub-track and track in a horizontal plane. The purpose of the invention is to expand its functionality. FIG. 1 shows the device, a general VIEW} in FIG. 2 is a diagram of the installation of sensors relative to a pair of wheels | in fig. 3 - sub-block: measurements of transverse displacements; in fig. 4, a sub-unit for measuring angular displacements of a wheel pair; Fig. 5 shows a sub-measurement of the change in distance between the heads of the track rails. The device for determining the position of the wheel pair in a track consists of two brackets 1, two precast sidewalls 2, two crossbars 3 and four sensor boxes A (FIG. 1). Sensor boxes 4 are bolted to the cross bars. Capacitive sensors 5 are bolted in the grooves of the boxes. The frame structure of the device allows for adjusting the position of the sensors on it in three directions: down: along the axis of the track, across the axis of the track, as well as adjusting the height relative to the rail heads. Height adjustment is carried out by raising or lowering the crossbars with sensors fixed on them with the help of bolts 6, resting on the flanges of the sidewalls. The installation of sensors relative to the wheelset is shown in FIG. 2, The arrow on the diagram indicates the direction of travel of the crew, the numbers indicate the numbers of the sensors. Figures 3-5 show schematic diagrams of sub blocks of an immitting registering unit. In the diagrams | Y,.,., U4, the electric signals are proportional to the transverse displacements of the respective sensors. The device works as follows. When the frame of the device is installed on a diesel locomotive, it is attached with brackets to the covers of the axle boxes and is bolted together with them on both sides. It is possible to install the frame of the device on trolleys with maxillary axle boxes as well as on telescopes with maxillary axle boxes. The frame of the device with sensors fits into the size of 2Т according to GOST 9238-73 for non-spliced parts, which makes it possible to install it on the locomotive in the depot before leaving for testing. The sensors are adjusted along the track axis by displacing the sensors in the slots of the sensor boxes by +20 mm from the geometric center. The adjustment of the position of the sensors in the direction perpendicular to the axis of the path is made by displacing the sensor boxes in the grooves of the crossmembers within 20 mm from. geometric center. Capacitive sensors are connected to an electronic circuit. The electronic circuit is a high-frequency sinusoidal oscillation generator assembled on an operational amplifier. High-frequency oscillations from the generator are fed to an electronic bridge, to which the sensor plates are connected, which together with the rail head form two electrical capacitances. When the plates move relative to the rail head in the horizontal plane, the value of one tank increases, the other decreases, and vice versa. The signals from the four sensors are fed to a summing-registering unit consisting of three sub-blocks, the output of which, after calibration, generates DC voltages proportional to the linear displacements of the sensors in the horizontal i plane; the angular displacement of the wheelset | the change in the distance between the rail heads in the track. These voltages are applied to a galv, a spectrum oscilloscope, which allows the recording of these parameters over time. The operation of the registering and registering block is based on the following geometrical dependencies (Fig. 2J; 1 Y — b; D U .. l V J- (y – U t UZ – U4), where Y is transverse displacement; Vj is angular in terms of displacement center of the body of the wheelset;

distance between sensors;

lateral displacement i-ro sensor relative to the longitudinal-. Noah rail axis, i 1, 2, 3,

,five . - 5 i rail rail widening

L - distance between points

contact wheels with rails. The sign y. Is chosen depending on the direction of the displacement of the sensor: positive - when the sensor is displaced inwards from the direction of movement and negative - in the opposite direction.

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Claims (2)

1. DEVICE FOR DETERMINING THE POSITION OF A WHEEL PAIR IN A RAIL STEEL, consisting of a rigid frame i designed for fastening to a axle box a pair of wheels and supporting sensors connected to measuring equipment, characterized in that, in order to expand their functionality, they are used as sensors at least at least three capacitive non-contact transducers, two of which are sequentially mounted above one rail, and the rest above the other, and the measuring equipment is equipped with three blocks registering the lateral the widening of the wheelset, the angular movement of the wheelset in the horizontal plane and the change in the distance between the rail heads. 2. The device according to p. 1, characterized in that, in order to improve the accuracy of regulation of the position of the transducers, the latter are mounted in the grooves of the frame using bolted connections. > ϊ 1176199